Xie Y, Wang Y, Wu L. One-Pot Synthesis of 7-Alkyl-6H,7H-naphtho[1’,2’:5,6]pyrano[3,2-c]chromen-6-ones in Presence of Alum. ajc [Internet]. 2011 Sep. 26 [cited 2024 Nov. 25];23(12):5377-80. Available from: https://asianpubs.org/index.php/ajchem/article/view/11155